Date: Sat, 18 Sep 2004 16:49:12 -0600 From: Scott Long <scottl@samsco.org> To: Kris Kennaway <kris@obsecurity.org> Cc: freebsd-current@freebsd.org Subject: Re: ULE scheduler not quite there yet Message-ID: <414CBB68.9070800@samsco.org> In-Reply-To: <20040918222412.GA10696@xor.obsecurity.org> References: <1095534403.1151.4.camel@server.mcneil.com> <20040918222412.GA10696@xor.obsecurity.org>
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Kris Kennaway wrote: > On Sat, Sep 18, 2004 at 12:06:43PM -0700, Sean McNeil wrote: > >>I've had good luck with the 4BSD scheduler and PREEMPTION on so I >>thought I would try the ULE scheduler. Was up for just a short time >>before I got the following on my amd64 machine: > > > This is a known problem, BTW. > > Kris There is likely a message at the top of the dmesg output that says, "WARNING: Kernel PREEMPTION is unstable under SCHED_ULE." This has been discussed quite a bit recently and we decided that focusing on the 4BSD scheduler gave us a better chance at having a stable system for 5.3. I still welcome anyone to step in and investigate the problems with ULE. Scott
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